Where a recurrence of psychotic symptoms in prison was entirely predictable and within the contemplation of the sentencing judge, post-sentence psychiatric evidence does not demonstrate the 'true significance' of the offender's mental condition so as to warrant admission as fresh evidence on appeal. The common law sentencing discretion already enables consideration of the burden of imprisonment on mentally ill offenders, including the limited nature and quality of psychiatric treatment in correctional institutions, without recourse to international instruments.
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